本文選題：潮流計(jì)算　切入點(diǎn)：柔性直流輸電　出處：《沈陽(yáng)工業(yè)大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：自從世界上第一個(gè)直流輸電工程投入商業(yè)運(yùn)行，高壓直流輸電系統(tǒng)的發(fā)展經(jīng)歷了巨大的變化。近年來(lái)光伏發(fā)電和風(fēng)力發(fā)電因其具有清潔、可再生等優(yōu)點(diǎn)受到了人們?cè)絹?lái)越多的關(guān)注。但是可再生能源的大規(guī)模應(yīng)用使得與交流輸電系統(tǒng)或傳統(tǒng)的高壓直流輸電系統(tǒng)的并網(wǎng)產(chǎn)生了新的問(wèn)題。當(dāng)新能源并網(wǎng)后，電力系統(tǒng)潮流方程也不同于傳統(tǒng)潮流方程。因此，解決含有柔性直流輸電及新能源的電力系統(tǒng)潮流算法問(wèn)題對(duì)電網(wǎng)未來(lái)建設(shè)有著重要的意義。 本文首先研究了VSC-HVDC的組成以及工作原理，分析了柔性直流輸電各部分的作用。在此基礎(chǔ)上，研究了多端柔性直流輸電系統(tǒng)及其數(shù)學(xué)模型，分析了電壓源換流器的穩(wěn)態(tài)控制方式。采用了針對(duì)多端交直流混合輸電系統(tǒng)的潮流計(jì)算統(tǒng)一迭代求解方法，詳細(xì)介紹了在該算法下直流系統(tǒng)方程和功率偏差方程以及雅可比矩陣的形成方法，并根據(jù)VSC的各種不同控制方式，對(duì)雅克比矩陣進(jìn)行修正。在介紹統(tǒng)一迭代法的同時(shí)給出了交替求解法計(jì)算流程圖。采用本文所述統(tǒng)一迭代法對(duì)多端交直流混合系統(tǒng)、區(qū)域互聯(lián)系統(tǒng)以及復(fù)雜混聯(lián)系統(tǒng)算例進(jìn)行了計(jì)算和驗(yàn)證，計(jì)算結(jié)果證明了該統(tǒng)一迭代算法的有效性和準(zhǔn)確性以及針對(duì)不同類(lèi)型算例的適應(yīng)性。 在此基礎(chǔ)上針對(duì)含有新能源的潮流計(jì)算方法展開(kāi)研究。分別討論了光伏和風(fēng)電的運(yùn)行原理，將建立的光伏發(fā)電系統(tǒng)數(shù)學(xué)模型和風(fēng)電場(chǎng)數(shù)學(xué)模型與電力系統(tǒng)潮流模型結(jié)合，，采用交直流統(tǒng)一迭代算法，對(duì)含光伏發(fā)電和風(fēng)電系統(tǒng)的電力系統(tǒng)進(jìn)行潮流計(jì)算。
[Abstract]:Since the first HVDC project was put into commercial operation in the world, the development of HVDC system has undergone tremendous changes. People pay more and more attention to the advantages of renewable energy, but the large-scale application of renewable energy causes new problems with AC transmission system or traditional HVDC system. The power flow equation of power system is also different from the traditional power flow equation. Therefore, it is of great significance to solve the power flow algorithm problem of power system with flexible direct current transmission and new energy sources. In this paper, the composition and working principle of VSC-HVDC are studied, and the function of each part of flexible direct current transmission is analyzed. On this basis, the multi-terminal flexible direct current transmission system and its mathematical model are studied. The steady-state control mode of voltage source converter is analyzed, and the unified iterative method of power flow calculation for multi-terminal AC / DC hybrid transmission system is adopted. In this paper, the DC system equation, power deviation equation and Jacobian matrix under the algorithm are introduced in detail, and according to the different control methods of VSC, The Jacobian matrix is modified. The unified iterative method is introduced and the flow chart of the alternating solution method is given. The unified iterative method is used in the multiterminal AC / DC hybrid system. The examples of regional interconnected system and complex hybrid system are calculated and verified. The results show the validity and accuracy of the unified iterative algorithm and the adaptability of the algorithm to different types of examples. On this basis, the calculation method of power flow with new energy is studied. The operation principle of photovoltaic and wind power is discussed, and the mathematical model of photovoltaic system and wind farm is combined with the power flow model of power system. A unified AC / DC iterative algorithm is used to calculate the power flow of the power system with photovoltaic and wind power systems.
【學(xué)位授予單位】：沈陽(yáng)工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM744

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